GM 8L90 PUMP CHAIN & SPROCKET ASSEMBLY
The GM 8L90 pump chain and sprocket assembly generally fits 8-speed automatic (M5U) transmissions found in various General Motors rear-wheel-drive vehicles, primarily spanning model years 2015–2021. While the 8L90 transmission was introduced in some 2014 models, the replacement pump chain and sprocket kits are most commonly listed for 2015 and later vehicles, with specific parts often designed for 2015–2017 or 2018-up depending on the specific update.
Fits Years, Makes, and Models (8L90 Transmission):
- Cadillac:
- Escalade / Escalade ESV (2015–2020)
- ATS / ATS-V (2016–2019)
- CTS / CTS-V (2016–2019)
- CT6 (2016–2019)
- Chevrolet:
- Corvette (C7) (2015–2019)
- Silverado 1500 (2015–2020)
- Silverado 2500/3500HD (2015–2019)
- Camaro (2016–2019)
- Tahoe / Suburban (2015–2020)
- Colorado (2017–2019)
- Express (2015-up)
- GMC:
- Sierra 1500 (2015–2020)
- Sierra 2500/3500HD (2015–2019)
- Yukon / Yukon XL / Denali (2015–2020)
- Canyon (2017–2019)
- Savana (2015-up)
Component Details & Specific Fitment Notes:
- Assembly Includes: The assembly typically includes the pump drive sprocket (40T), pump driven sprocket (38T), and the drive chain.
- Part Numbers/Interchange: Kits often interchange with OEM numbers such as 24280781, covering 2015-2021 models.
- Generational Changes: Some aftermarket listings differentiate between 2015–2017 and 2018-up due to changes in the pump retainer pistons and internal components.
- 8L45 Compatibility: Many pump component kits are listed as fitting both the 8L90 (heavy-duty) and 8L45 (light-duty) 8-speed transmissions.
- Performance/Crate Engines: The 8L90-E is also used in Chevrolet Performance SuperMatic kits for LT1/LT4/LT5 engines.
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